Spending 1x the payout versus 3x the payout during the testing phase?

Hi everyone, I took a ppc course and the teacher recommended that when testing ad sets, it's important to use a budget per adset of 1x the payout. So, if the payout is $15, I should spend $15 per adset to test it. If I don't get a sale after spending $15, I kill the adset. The goal is the create 5-10 new ad sets each day, spending 1x the payout per ad set. From there I can optimize.

However, Propeller Ads published a guide for promoting sweepstake offers and they recommend spending 3x the payout per ad zone. An adset is similar to an ad zone.

Which would you recommend? Testing 1x or 3x the payout?

Thanks

3x mate

Gotta do more than 1x. Would reco at least 2x